The image forming apparatus and method subject image data to predetermined image processing to obtain processed image data and execute both of outputting a print according to the processed image data and outputting the processed image data to an image file. The apparatus and method create information for identifying an original before an image of the original is read to input the image data and storing the original identifying information in a data base in relation to the image file, read out, when a reprint is requested by designating the original identifying information, predetermined processed image data from the image file of the data base based on the original identifying information and output the print according to the predetermined processed image data. As a result, the apparatus and method are capable of easily designating a corresponding image file when a reprint is requested and capable of easily outputting the reprint from the image file without the need of an original film.